The way you can tell is look at tennisrecruiting.net, if a guy has N/A for his rankings then he is pro.

Not necessarily. I think some of the guys with N/A for rankings have not gone pro and are going to college, but they decided to stop playing junior events and with time lost all their remaining ranking points.

Not necessarily. I think some of the guys with N/A for rankings have not gone pro and are going to college, but they decided to stop playing junior events and with time lost all their remaining ranking points.

That's possible too but if you look at Mitchell for example, as soon as he went pro he has N/A and he's removed from the ranking.

Two of the wins came from unlikely sources, with 14-year-old qualifiers Tornado Black and Michael Mmoh picking up victories in their junior slam debuts. Black defeated Oleksandra Korashvili of Ukraine, No. 30 in the ITF junior rankings, 6-3, 6-4, and Mmoh downed Gabriel Friedrich of Brazil 6-4, 6-3.

Mmoh was part of the USA's 14-and-under team that won the ITF World Junior Tennis competition just a couple of weeks ago, but he said a more recent victory was actually what gave him the confidence to win today.

"I was lucky to get through the qualifying, I had to save a match point," said Mmoh, who defeated No. 3 seed Jorge Panta Herreros of Peru 4-6, 7-6(7), 3-0 ret. in a nearly four-hour match in the final round of qualifying Saturday. "Beating that last guy, who was like 60 ITF, that gave me a lot of confidence. I see a lot of players who are ranked high, and I think I can beat them, but I don't have the confidence yet. That win really helped my confidence."

Mmoh hadn't played Friedrich before, but he inquired about the 30th-ranked Brazilian's game style from another 14-year-old who had.

"I asked (Stefan) Kozlov about him, and he told me a bit about his game, so I guessed that helped me. He had a big forehand, very dangerous, and his serve was also pretty good. His movement wasn't as good as some of his other stuff."

Mmoh was happy to take advantage of that , and was determined to play with a more dynamic strategy now that he's playing in the 18s.

"In the 12s, I wasn't very aggressive, was more of a counterpuncher," said Mmoh, who is 6-foot-1. "I am working every day on getting way more aggressive. My dad, who was former Top 100, he's always telling me I can't be a counterpuncher, I've got to go for the ball. This match, I felt like I was really aggressive."

It will be a waste if he goes down the counter-puncher path with his size.

Definitely. Btw, speaking of his size, wow at that picture. It's impossible to predict how he will grow through the next few years but that is one strong and athletic looking 14 year old. Exactly the kind of athlete we need in tennis.